0
Anonymous
16
Breanne Watsica ∙
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you need to add +9 +9-7 = +2
nine add 7 to get from -7 to 0 then add 2 to get to 2 7 + 2 = 9
1+3+5+7+9+7+9+9
factor OS 63 63 - 1, 3, 7, 9, 21, 63 7 and 9 add up to 16 7+9=16
9 10ths